In another thread a forum participant indicated that he wanted "canned" diagrams to be available. My first thought was that it would be prohibitively expensive. Then I got an idea - not brillant but at least good. This is a project that everyone could do together.
1) Ask some very competent people (perhaps professors) to be editors
2) Take a group of volunteers and/or students and assign them sentences to diagram (original Greek and Hebrew should have priority) and assign them a few sentences to digram.
3) Encourage the volunteers to find alternative diagrams when the text is ambiguous.
4) Encourage the volunteers to diagram alternative texts when the source text changes the diagram.
5) Have the very competent people review and release the diagrams.
Over time Logos could have an excellent resource at minimum cost.
Doing the same sort of thing on the English could, for example, build up a library of arcing diagrams.
Yes, I know I've not been keen on volunteer based resources before but I think this could really work.